linux-kernel - Re: [PATCH] GPU-DRM-Tegra: Delete an unnecessary check before the function call "vunmap"

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Date:	Wed, 8 Jul 2015 20:40:16 +0200
From:	SF Markus Elfring <elfring@...rs.sourceforge.net>
To:	Alexandre Courbot <gnurou@...il.com>,
	David Airlie <airlied@...ux.ie>,
	Stephen Warren <swarren@...dotorg.org>,
	Terje Bergström <tbergstrom@...dia.com>,
	Thierry Reding <thierry.reding@...il.com>,
	dri-devel@...ts.freedesktop.org, linux-tegra@...r.kernel.org
Cc:	LKML <linux-kernel@...r.kernel.org>,
	kernel-janitors@...r.kernel.org,
	Julia Lawall <julia.lawall@...6.fr>
Subject: Re: [PATCH] GPU-DRM-Tegra: Delete an unnecessary check before the
 function call "vunmap"

> From: Markus Elfring <elfring@...rs.sourceforge.net>
> Date: Thu, 5 Feb 2015 10:12:51 +0100
> 
> The vunmap() function performs also input parameter validation.
> Thus the test around the call is not needed.
> 
> This issue was detected by using the Coccinelle software.
> 
> Signed-off-by: Markus Elfring <elfring@...rs.sourceforge.net>
> ---
>  drivers/gpu/drm/tegra/fb.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/tegra/fb.c b/drivers/gpu/drm/tegra/fb.c
> index e9c715d..803598e 100644
> --- a/drivers/gpu/drm/tegra/fb.c
> +++ b/drivers/gpu/drm/tegra/fb.c
> @@ -66,7 +66,7 @@ static void tegra_fb_destroy(struct drm_framebuffer *framebuffer)
>  		struct tegra_bo *bo = fb->planes[i];
>  
>  		if (bo) {
> -			if (bo->pages && bo->vaddr)
> +			if (bo->pages)
>  				vunmap(bo->vaddr);
>  
>  			drm_gem_object_unreference_unlocked(&bo->gem);
> 

Would you like to integrate this update suggestion
into another source code repository?

Regards,
Markus
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